The Antiquities Act of 1906 was passed in order to protect threatened historic ruins, structures and landmarks, and accordingly, it grants the President the power to designate such features as national monuments. Despite this goal, several Presidents have used this authority to unilaterally withdraw hundreds of thousands of acres of federal land from public use.
John Yoo & Todd Gaziano,
Presidential Authority to Revoke or Reduce National Monument Designations,
Yale J. on Reg.
Available at: https://digitalcommons.law.yale.edu/yjreg/vol35/iss2/6